Horizontal extrusion press



April 6, 1937'. R. w. DINZL ET'AL HORIZONTAL EXTRUSION PRESS 2sheets-sheet 1 Filed Sept. 6, 1935 5 m A. T v m m mm N m an Q 7 e mu R NN on Md .N, W. k 1 NJ hm EN X 4 :5 0 4% Q a o E IL l1 R m E W D/hz/ J.C. Gra/ April 1937- R. w. DINZL ET AL 2,075,803

HORIZONTAL EXTRUSION PRESS Filed Sept. 6, 1955. 2 Sheets-Sheet 2INVENTORS E. W Dl'rzz/ J C. Grn/ Patented Apr 6; 1937 UNITED STATES"2,075,803 HORIZONTAL nx'rnusron raEss Richard WDinzi,

Narberth, and John C. Graf,

Philadelphia, Pa., assignors to Baldwin-Southwark Corporation. acorporation of Delaware Application September 6, 1935, Serial No. 39,438

12 Claims.

This invention relates generally to horizontal extrusion presses andmore particularly to an improved combination of elements for maintainingthe die and plunger in alignment during expansion or contraction ofthose parts of the press which are subjected to considerable heat durinextruding operations, although the invention also relates to featuresfor improving the efliciency and operation of the press.

1.0 The extrusion of hot metals in horizontal presses has long presentedthe problem of maintaining the die and plunger in substantiallyprecision alignment during expansion of those of the press which arenecessarily subjected to 15 heat during extruding operations. This haslong been recognized as a very important problem in view oi. thetremendous operating forces involved together with the large size of thepress, particularly in horizontal presses wherein expansion wouldnormally take place-in an upward direction with respect to thefoundation. Such vertical expansion may vary widely at longitudinallyspaced points of a. horizontal machine depending upon the extent oflocalized heat. Various devices and arrangements have heretofore beenproposed in an attempt to provide .a satisfactory solution to theforegoing problem, but such prior arrangements have been'deficient inone respect or another. In certain of these prior arrangements, it

is attempted to maintain a elevation of the axis of the die duringheating of the die container. Such an arrangement thus requires anon-varying axis for a particular part in orderto be fully eflective inmaintaining align- 3 ment between the plunger and die and furtherassumes that'no other part of the machine will expand or distort.

It is one object of our invention to provide an improved combination forbringing all parts of 40 the-press into such cooperative relation thatthe press has a self-contained axis of alignment whereby the elevationor inclination of this axis may vary due to temperature changes butwithout disturbing the alignment-of parts. As a result of our improvedarrangement, it is seen that temperature changes of varying degrees andin known or unknown locations 01' a machine will be automatically takencare of without any additional devices, arrangements or provisionstherefor. A

a further object is to provide improved details of construction forlaterally aligning the die holder regardless of the floating action ofthe machine axis and to provide improved billet loading means.

Other objects and advantages will be more apparts fixed or non-varyingparent to those skilled in the art from the following description of theaccompanying drawings in which:

1 Fig. 1 is a vertical longitudinal section of an extrusion pressembodying the principles of our 5 invention;

Fig. 2 is a plan view of Fig. 1; Figs. 3 and 4 are transverse sectionstaken respectively on lines 3-3 and 4-4 of Fig. 1;

Fig. 5 is an enlarged fragmentary sectional view of one portion of thebillet elevating means;

Fig. 6 is a partial longitudinal sectional view of modified means forsupporting the main rams.

In the particular embodiments of the invention which are shown hereinmerely for the purpose of illustrating certain specific forms amongpossibly others that the invention might take, I have shown in Fig. 1 abed I extending for, substantially the full length of the press.Supported upon'one end of the bed are a pair of superim posed mainoperating cylinders 2 and 8. These cylinders may be supported in fixedrelation to each other by any usual means although for purposes orillustration a main cylinder pedestal or column 4 is provided and is soarranged as. to receive the cylinders in suitable openings 5. Thispedestal may be supported in various manners on base I and suitablysecured thereto by bolts or transverse keys. Side rods hereinafterdescribed will resist reaction forces during operation of rams I and 8,and hence the cylinder pedestal does not have to be secured to the basewith suflicient strength to resist the entire reaction forces. Hencesecuring of the pedestal to the base may be of a nominal nature so asnot to interfere with a varying elevation of the axis of the die and itsplunger in the manner to be described later. A supplemental supportingmemher 9 of comparatively small dimensions may be interposed betweenbase I and cylinder 8 to support the outer end thereof. This support maybe merely an unsecured surface contact or lightly secured if desired.The outer ends of the two cylinders may be supported withrespect to eachother by a suitable yoke Ill. The outer ends of rams 1 and 8 carry aplaten l I while a die plunger I2 is supported in any usual manner onthe front of platen ll. A-piercing tool I3 is operated by an I axiallylocated ram II, the cylinder I5 therefor being supported in pedestal 4.

Supported at the other end of base I is a die pedestal l6 upon which issupported a die and preheating container generally indicated at IT. Thiscontainer may be of any usual type, and hence its construction will bedescribed only generally; It comprises a die It supported in a holderl9, this holder in turn being supported within a suitably recessedmember 20 and held against longitudinal movement by a vertically movablelocking block 2!. This block is operated by a suitable operating ram andcylinder generally indicated at 22. A billet container 23, supportedwithin an annular casing 24, is adapted to be provided with one or morefiller sleeves 25 del pending upon whether a tube or rod is to beextruded. Such sleeves, however, seat against die l8 to provide a. tightjoint therewith and prevent leakage of material 'during the extrudingoperation. Annular casing 24 and all of the associated parts includingsleeve 25 are axially movable by one or more rams 26 in order to eifecta sealing contact between sleeve 25 and die l8. Casing 24 has an'annularrecess 21 provided with a hot gas inlet 28 and an outlet 29, Fig. 4, forthe purpose of preheating the die parts and containerbefore commencingthe extruding operation. The tremendous heat at this part of theapparatus is transmitted in part to pedestal l6 to cause expansionthereof vertically. Die l8 moves therewith with the result that its axishas a varying elevation.

To prevent misalignment between the axis of die l8 and the die plungersdue to expansion of pedestal Hi, we have provided the following improvedarrangement. rods 30 and 3| preferably of square cross-section extendthrough openings in pedestals 4 and I6 and are secured thereto in anysuitable manner such as by nuts 32. The side rods are preferablydisposed with their axes in a common horizontal plane containing theaxis of the die and plunger, and they function not only as tension rodsbut also as part of the means for providing the selfcontained axis ofalignment. Platen II is supported upon said rods, as is shown moreclearly in Fig. 3, by the provision of outwardly and longitudinallyprojecting wings 35 in which suitable openings are provided toreceive-upper, lower and lateral bearings plates 36, these bearingsslidably engaging said rods and each being adjustable by any usual formof tapered gib construction. The platen can thus be laterally andvertically adjusted for purposes of initial alignment.

The heater container 24 as shown more clearly in Fig. 4 is alsoSupported upon rods 30 and 3| through a pair of upper lateral flanges 33and a pair of lower keeper plates 34 bolted to the container. Interposedbetween flanges 33 and the rods are any usual form of adjustable taperedgibs to permit vertical adjustment of the die although lateral clearanceis provided between side rods 30 and 3| and container 24 to permitfreelateral expansion movement thereof. The flanges 33, 33 slide laterallyon the flat upper surfaces of the side rods during such expansion. 7

A simple and efiective means for laterally adjusting die holder l9 andcontainer 24 comprises a guide member 44 bolted to the face of pedestalII and projecting over container 24. A longitudinal slot 45, formed inmember 44, is provided with tapered gibs 46 engaging a pin or lug 41projecting upwardly from container 24, said gibs being adjustable in anyusual manner so as to eifect lateral adjustment of container 24 and thedie housing l9. From the foregoing it is seen that the die can belaterally and vertically addusted for purposes of initial alignment andalso during lateral expansion of the die and die container upon heatingthereof, the lug 4'! and slot 45 com:

A pair of horizontal side' prises means for laterally maintaining saiddie in an axial position.

Die l8 and its holder l9 by being supported directly against pedestal l6as shown in Fig. 1 will rise and fall during expansion and contractionof pedestal l6. Expansion is caused'by heat transmitted to the pedestalduring the preheating operation of the die and sleeve as well as durving the extruding operation, and such expansion may cause the die axisto vary in elevation or inclination as much as one-eighth inch or morefor a large size press. However, the side rods 30 and 3| are ofsuflicient strength to vertically support the die and plunger and causethe die container and platen I I to move vertically as a unit, thusmaintaining the die and die plungers in alignment. The rods will alsocause flexure of the cylinder pedestal or base if such flexure should berequired to maintain said alignment, but if the press if of suchconstruction or minimum length, or if for any reason it is desired toavoid said fiexure, then the cylinders may be pivotally or otherwisemovably or flexibly supported by base I in any suitable manner. One suchmeans is shown in Fig. 6 as comprising a pivot pin 31 interposed betweenthe bottom of a cylinder pedestal 9' and base I. In this form thecylinders may, if desired, be disposed symmetrically with respect topedestal 9. It is seen that notwithstanding any relative movementbetween the cylinders and base I, still the die and die plungers will bemaintained in alignment due to the plunger platen I I and die I8 beingpositively supported by the rods 30 and 3|. It is seen that there can bea wide variation in the elevation or inclination of the die and dieplunger axis without possibility of misalignment thereof and without thenecessity of taking into consideration any stress or temperaturevariations which may occur in known or unknown locations of the press.Hence I have provided an extremely eifective means self-' contained withthe press for maintaining the dieand its plunger in axial alignmentduring variations in elevation thereofcaused by expansion of any part ofthe press particularly the pedestal upon which the die is supported;

If desired, the rods 30 and 3! may be partially bored adjacent pedestalI6 and water circulated therein to maintain the same cool so as tominimize or avoid unnecessary initial clearance between the rods and theadjustable tapered gib bearing plates 36, Fig. 3. V

As shown in Figs. 1 and 5, a billet is inserted into sleeve 25 by beingplaced upon a holder 50 when in its lower position 5|. This holder issimply a longitudinal recessed member which when in its lower receivingposition is turned at right angles to its upper position. The holder issupported upon the upper end of a ram 52 which projects down into asuitable casing 53 formed preferably as part of the base l. .'A spiralkeyway 54 is, formed in plunger 52 while a suitable cooperating key heldfixed in a sleeve 55 is adapted to cause rotation of the plunger duringupward or downward movement thereof. Pressure is supplied to. theplunger cylinder from any suit-- able controlled source. A billet may beplaced in holder 50 and then raised into alignment with sleeve 25,whereupon platen ll together with rams 1 and 8 are moved forwardly tocause plunger l2 to move the billet into sleeve 25. In accordance withusual extrusion press operations, if a hollow tube is to be extruded,then piercing plunger I3 is forced through the billet by pressuresupplied to operate ram H. The piercing tool i3 is then held in spacedrelation col to die It to define an annular extruding space. Forwardmovement of the sleeve plunger I? under the power of rams i and 8 willthen extrude the billet through the annular space just described. 0n theother hand, if a solid rod is to be extruded, then piercing tool l3 andplunger ii are removed and a solid plunger substituted for plunger l2.However, during any of the foregoing operations, the die and itsplungers are maintained in alignment notwithstanding material variationsin the elevation or inclination of the die axis.

It will of course be understood that various changes in details ofconstruction and arrangement of parts may be made by those skilled in 4the art without departing from the spirit of the invention as set forthin the appended claims.

We claim:

1. A horizontal extrusion press comprising, in combination, a horizontaldie and die plunger, power means for effecting relative movement betweensaid die and its plunger, means for laterally maintaining said die in anaxial position during lateral expansion means supported supporting saiddie and plunger ment while at the same time lateral die expansion andallowing the plunger and die to have a varying elevation upon occurrenceof expansion of said pedestal.

2. A horizontal extrusion press comprising, in combination, a die andplunger therefor, a pedestal for supporting one able platen forsupporting the other, side rods supported by said. pedestalsubstantially in a horizontal plane containing the die and plunger axis,said rods having fiat horizontal surfaces, and and means for slidablysupporting said platen on said rods, whereby the flat surfaces of said.die and its plunger are maintained in axial alignment during variationsinelevation of their axis caused by vertical expansion of said pedestaland during lateral expansion of said die.

3. The combination set forth in claim 2 further characterized by theprovision of hydraulic ram mechanism for operating said die plunger,means for supporting said ram mechanism, ,and

by said pedestal for. vertically in axial alignpermittlng said meanswhereby said side rods are supported in 1 combination,

operative relation to said ram mechanism;

4. A horizontal extrusion press comprising, in combination, a horizontalbase, a pedestal at one end thereof, a die supported by said pedestal, apreheater container for said die, cylinder and ram mechanism supportedby said base at the other end thereof, a platen operable by said rammechanism, a die plunger carried by said platen, means for laterallymaintaining said die in a central position during expansion thereof, andmeans for vertically supporting said die and its plunger in axialalignment during said lateral die expansion and while the elevation ofsaid axis varies in accordance with expansion of said pedestal.

5. A horizontal extrusion press comprising, in a horizontal base, apedestal at one end thereof, a die supported by said pedestal, cylinderand ram mechanism supported by said base at the other end thereof, aplaten operable by said ram mechanism, a die plunger carried by saidplaten, means for laterally maintaining said die in an axial positionduring expansion thereof, and means supported by said pedestal andoperatively connected to said platen for maintaining the plunger and dieinaxial alignment during variations in elevation of the axis'thereof.

thereof, a vertical pedestal, and

the axis of of the same and a llllOV-' 6. A horizontal extrusion presscomprising, in combination, a horizontal base, a pedestal at one endthereof, a die supported by said pedestal, a preheater container forsaid die, cylinder and ram mechanism supported by said base at the otherend thereof, a platen operable by said ram mechanism, a die plungercarried by said platen, side rods disposed substantially in a horizontalplane containing the die and plunger axis and supported atone end bysaid pedestal and at the other end by said cylinder construction, saidrods having horizontal fiat supporting surfaces, and means forsupporting said die container and platen on said side rod surfaceswhereby said cylinders, a platen operated by said rams, a A

horizontal side plunger carried by said platen, rods disposedsubstantially in a horizontal plane containing the die and plunger axisand supported by said pedestals, said rods having horizontal flatsupporting surfaces, and means for supporting said die container andplunger on said side rod surfaces whereby the plunger and die aremaintained in alignment during variations in elevation thereof caused byexpansion of said die pedestal.

8. A horizontal extrusion press comprising, in combination, a base,pedestals supported by said base at opposite ends thereof, a diecontainer supported by one of said pedestals, two superimposed cylinderssupported by the other of said pedestals, rams in said cylinders, aplaten operated by said rams, a plunger carried by said platen,horizontal side rods disposed substantially in the horizontal planecontaining the (die and plunger axis and supported by said pedestals,with said cylinders located between said side rods, said rods havinghorizontal flat supporting surfaces, and means for supporting said diecontainer and plunger on said flat surfaces, whereby the plunger anddleare maintained in alignment during variations in elevation thereofcaused by expansion of saiddie pedestals.

9. The combination set forth in claim '4 further characterized in thatthe platen is operated by two cylinders and rams disposed insuperimposed relation and located between said side rods, a piercingtool, and an operating cylinder therefor interposed between saidcylinders.

10. A horizontal extrusion press comprising, in combination, ahorizontal base, a pedestal at one end thereof, a die supported by saidpedestal, a preheater container for said die, cylinder and ram mechanismsupported by said base at the other end thereof, a platen operable bysaid ram mechanism, a die plunger carried by said platen, means forlaterally, maintaining said die in a central posupported by said sitionduring expansion thereof including a die and plunger axis varies inaccordance with the expansion of said pedestal.

11. A horizontal extrusion press comprising, in combination, a base,pedestals supported thereon, a die container supported by one of saidpedestals, die plunger operating mechanism supported by the other 0fsaid pedestals, and a billet loading mechanism including a verticallymovable member provided with a spiral key and groove for ro- 10 tatingsaid member during upward movement thereof and fluid pressure means formoving said member, whereby said member when lowered is in a receivingposition and when moved upwardly is rotated to a loading position. b

.12. A horizontal extrusion press comprising, in

RICHARD W. DINZL. JOHN C. GRAF.

CERTIFICATE OF CORRECTION.

Patent No. 2,075,803. April 6, 1937.

RICHARD W. DINZL, ET AL.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 5,first column, line 57, claim 2, strike out the Word "and"; line 39, sameclaim, for "said rods, whereby the flat surfaces of said die" read theflat surfaces of said rods, whereby said die; and that the said LettersPatent should be read with these corrections therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 31st day of August, A. D. 1937.

Leslie Frazer (Seal) Acting Commissioner of Patents.

